Question 1

The volume of space occupied by a beryllium atom is 6.0 × 10-30 m3. What is this volume in units of nm3?

Accepted Answer

A)  6.0 × 10-57 nm 
B)  6.0 × 10-21 nm 
C)  6.0 × 10-12 nm 
D)  6.0 × 10-3 nm 
E)  6.0 × 106 nm 
A)  6.0 × 10-57 nm 
B)  6.0 × 10-21 nm 
C)  6.0 × 10-12 nm 
D)  6.0 × 10-3 nm 
E)  6.0 × 106 nm

Question 2

Which of the following volumes are equivalent to 75 L? 
1) 75 cm3
2)7.5 × 104 mL
3)0.0075 kL

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1, 2, and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1, 2, and 3

Question 3

The SI unit for the diffusion coefficient is m2/s, but older texts sometimes report diffusion coefficients in units of in2/min. What is the value of a diffusion coefficient of 21.3 in2/min expressed in SI units? (2.54 cm = 1 in exactly)

Accepted Answer

A)  9.02 × 10-3 m2/s 
B)  3.25 × 105 m2/s 
C)  14.0 m2/s 
D)  5.50 × 102 m2/s 
E)  2.29 × 10-4 m2/s 
A)  9.02 × 10-3 m2/s 
B)  3.25 × 105 m2/s 
C)  14.0 m2/s 
D)  5.50 × 102 m2/s 
E)  2.29 × 10-4 m2/s

Question 4

A car averages 26.5 miles per gallon of gasoline. How many liters of gasoline will be needed for a trip of 621 km? Some conversion factors that may be helpful are the following: 1 qt = 0.946 L 1 mile = 1.609 km 4 qt = 1 gal (exact) 1 ft = 12 in (exact)

Accepted Answer

A)  6 × 101 L 
B)  7 × 103 L 
C)  3 × 103 L 
D)  1 × 102 L 
E)  4 × 104 L 
A)  6 × 101 L 
B)  7 × 103 L 
C)  3 × 103 L 
D)  1 × 102 L 
E)  4 × 104 L

Question 5

The melting point of a solid is 39 °F. This corresponds to _____.

Accepted Answer

A)  295 K 
B)  312 K 
C)  286 K 
D)  277 K 
E)  312 K. 
A)  295 K 
B)  312 K 
C)  286 K 
D)  277 K 
E)  312 K.

Question 6

How many feet (ft) make up 0.397 km if 1 mi = 1.609 km and 5280 ft = 1 mi?

Accepted Answer

A)  1303.10 ft 
B)  $1.21 \times 10 ^ { - 4 }$ ft 
C)  $4.675 \times 10 ^ { - 5 }$ ft 
D)  3370.000 ft 
E)  $7.67 \times 10 ^ { - 4 }$ ft 
A)  1303.10 ft 
B)  $1.21 \times 10 ^ { - 4 }$ ft 
C)  $4.675 \times 10 ^ { - 5 }$ ft 
D)  3370.000 ft 
E)  $7.67 \times 10 ^ { - 4 }$ ft

Question 7

7.2 seconds contain this many picoseconds.

Accepted Answer

A)  7.2 × 109 
B)  7.2 × 1012 
C)  7.2 × 10-9 
D)  7.2 × 10-12 
E)  7.2 × 1015 
A)  7.2 × 109 
B)  7.2 × 1012 
C)  7.2 × 10-9 
D)  7.2 × 10-12 
E)  7.2 × 1015

Question 8

Convert 42.12 cm3 to cubic inches (in3) given that 1 inch = 2.54 cm (exact).

Accepted Answer

A)  2.570 in3 
B)  16.580 in3 
C)  107.0 in3 
D)  690.200 in3 
E)  0.3890 in3 
A)  2.570 in3 
B)  16.580 in3 
C)  107.0 in3 
D)  690.200 in3 
E)  0.3890 in3

Question 9

The absolute zero point on the Kelvin scale is equal to _____.

Accepted Answer

A)  -273.15 °C 
B)  0 °C 
C)  14.5 °C 
D)  25 °C 
E)  -373.15 ⁰C 
A)  -273.15 °C 
B)  0 °C 
C)  14.5 °C 
D)  25 °C 
E)  -373.15 ⁰C

Question 10

The figure below depicts a shooting target. The black dots represent the shots fired by a shooter. 
  
Which of the following best describes the shooter's results?

Accepted Answer

A)  Accurate and precise. 
B)  Precise but not accurate. 
C)  Neither accurate nor precise. 
D)  Accurate but not precise. 
E)  None of the these. 
A)  Accurate and precise. 
B)  Precise but not accurate. 
C)  Neither accurate nor precise. 
D)  Accurate but not precise. 
E)  None of the these.

Question 11

Assuming a large number of measurements is used to calculate the average of measurements, slightly more than _____ of the values collected are expected to be within two standard deviations

Accepted Answer

A)  50% 
B)  68% 
C)  83% 
D)  95% 
E)  100% 
A)  50% 
B)  68% 
C)  83% 
D)  95% 
E)  100%

Question 12

The number of significant figures in 2.1948 × 10-9 nm is _____.

Accepted Answer

A)  5 
B)  6 
C)  3 
D)  7 
E)  4 
A)  5 
B)  6 
C)  3 
D)  7 
E)  4

Question 13

A piece of metal (mass = 17.268 g) is placed in 10.50 mL of chloroform (d = 1.498 g/mL) in a 25-mL graduated cylinder. The chloroform level increases to 15.46 mL. The best value for density of this metal from these data is

Accepted Answer

A)  1.12 g/mL. 
B)  2.32 g/mL. 
C)  3.481 g/mL. 
D)  5.22 g/mL. 
E)  3.48 g/mL. 
A)  1.12 g/mL. 
B)  2.32 g/mL. 
C)  3.481 g/mL. 
D)  5.22 g/mL. 
E)  3.48 g/mL.

Question 14

Silver chloride (AgCl) is relatively insoluble in water. At 25 °C, 1.3 × 103 L of water is needed to dissolve 2.5 g of AgCl. What mass (in milligrams) of AgCl will dissolve in 1.0 L of water?

Accepted Answer

A)  1.9 × 10-3 mg 
B)  1.9 mg 
C)  0.52 mg 
D)  520 mg 
E)  1.9 × 10-6 mg 
A)  1.9 × 10-3 mg 
B)  1.9 mg 
C)  0.52 mg 
D)  520 mg 
E)  1.9 × 10-6 mg

Question 15

Which response has the correct number of significant figures and units for the following mathematical operation? ? $9.23 \times 10 ^ { 5 } \mathrm { ergs } \times \frac { 1.000 \mathrm {~J} } { 1.000 \times 10 ^ { 7 } \mathrm { ergs } } \times \frac { 1.000 \mathrm { cal } } { 4.184 \mathrm {~J} } \times \frac { 1 \mathrm { kcal } } { 1000 \mathrm { cal } }$

Accepted Answer

A)  2.206 × 10-5 J/cal 
B)  2 × 10-5 kcal 
C)  2.206 × 10-5 kcal 
D)  2.21 × 10-5 kcal 
E)  2.2 × 10-5 kcal 
A)  2.206 × 10-5 J/cal 
B)  2 × 10-5 kcal 
C)  2.206 × 10-5 kcal 
D)  2.21 × 10-5 kcal 
E)  2.2 × 10-5 kcal

Question 16

Convert 0.390 ng to milligrams and express the answer in scientific notation using the correct number of significant figures.

Accepted Answer

A)  3.90 × 10-5 mg 
B)  3.90 × 10-7 mg 
C)  3.9 × 10-7 mg 
D)  0.390 × 10-8 mg 
E)  0.390 × 10-7 mg 
A)  3.90 × 10-5 mg 
B)  3.90 × 10-7 mg 
C)  3.9 × 10-7 mg 
D)  0.390 × 10-8 mg 
E)  0.390 × 10-7 mg

Question 17

As the standard deviation of an average of several measurements increases, _____.

Accepted Answer

A)  the accuracy of the measurement increases. 
B)  the precision of the measurement increases. 
C)  the accuracy and precision of the measurement decreases. 
D)  the accuracy of the measurement decreases. 
E)  the precision of the measurement decreases. 
A)  the accuracy of the measurement increases. 
B)  the precision of the measurement increases. 
C)  the accuracy and precision of the measurement decreases. 
D)  the accuracy of the measurement decreases. 
E)  the precision of the measurement decreases.

Question 18

Carry out the following calculation and report your answer to the correct number of sig figs: 
$\frac { 2.423 \times 3.51 } { \text { num3 } }$

Accepted Answer

A)  1.6 
B)  1.57 
C)  1.566 
D)  1.5662 
E)  1.56625 
A)  1.6 
B)  1.57 
C)  1.566 
D)  1.5662 
E)  1.56625

Question 19

How many joules are equivalent to 450 calories?

Accepted Answer

A)  0.45 J 
B)  4.5 × 102 J 
C)  9.3 × 10-3 J 
D)  1.9 × 103 J 
E)  4.5 × 105 J 
A)  0.45 J 
B)  4.5 × 102 J 
C)  9.3 × 10-3 J 
D)  1.9 × 103 J 
E)  4.5 × 105 J

Question 20

A 4.75 cm3 sample of solid gallium metal has a density of 5.910 g/cm3. What volume does this sample of gallium occupy in its liquid state? The density of liquid gallium is 6.100 g/cm3.

Accepted Answer

A)  4.60 cm3 
B)  4.90 cm3 
C)  0.13 cm3 
D)  171.00 cm3 
E)  0.20 cm3 
A)  4.60 cm3 
B)  4.90 cm3 
C)  0.13 cm3 
D)  171.00 cm3 
E)  0.20 cm3

Exam 2: Lets Review: the Tools of Quantitative Chemistry

The volume of space occupied by a beryllium atom is 6.0 × 10-30 m3. What is this volume in units of nm3?

Which of the following volumes are equivalent to 75 L? 1) 75 cm3 2)7.5 × 104 mL 3)0.0075 kL

The SI unit for the diffusion coefficient is m2/s, but older texts sometimes report diffusion coefficients in units of in2/min. What is the value of a diffusion coefficient of 21.3 in2/min expressed in SI units? (2.54 cm = 1 in exactly)

A car averages 26.5 miles per gallon of gasoline. How many liters of gasoline will be needed for a trip of 621 km? Some conversion factors that may be helpful are the following: 1 qt = 0.946 L 1 mile = 1.609 km 4 qt = 1 gal (exact) 1 ft = 12 in (exact)

The melting point of a solid is 39 °F. This corresponds to _____.

How many feet (ft) make up 0.397 km if 1 mi = 1.609 km and 5280 ft = 1 mi?

7.2 seconds contain this many picoseconds.

Convert 42.12 cm3 to cubic inches (in3) given that 1 inch = 2.54 cm (exact).

The absolute zero point on the Kelvin scale is equal to _____.

The figure below depicts a shooting target. The black dots represent the shots fired by a shooter. Which of the following best describes the shooter's results?

Assuming a large number of measurements is used to calculate the average of measurements, slightly more than _____ of the values collected are expected to be within two standard deviations

The number of significant figures in 2.1948 × 10-9 nm is _____.

A piece of metal (mass = 17.268 g) is placed in 10.50 mL of chloroform (d = 1.498 g/mL) in a 25-mL graduated cylinder. The chloroform level increases to 15.46 mL. The best value for density of this metal from these data is

Silver chloride (AgCl) is relatively insoluble in water. At 25 °C, 1.3 × 103 L of water is needed to dissolve 2.5 g of AgCl. What mass (in milligrams) of AgCl will dissolve in 1.0 L of water?

Convert 0.390 ng to milligrams and express the answer in scientific notation using the correct number of significant figures.

As the standard deviation of an average of several measurements increases, _____.

Carry out the following calculation and report your answer to the correct number of sig figs: 2.423×3.51 num3 \frac { 2.423 \times 3.51 } { \text { num3 } } num3 2.423×3.51​

How many joules are equivalent to 450 calories?

A 4.75 cm3 sample of solid gallium metal has a density of 5.910 g/cm3. What volume does this sample of gallium occupy in its liquid state? The density of liquid gallium is 6.100 g/cm3.

Basic Concepts of Chemistry

Atoms, Molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

The volume of space occupied by a beryllium atom is 6.0 × 10^-30 m³. What is this volume in units of nm³?

Which of the following volumes are equivalent to 75 L? 1) 75 cm³ 2)7.5 × 10⁴ mL 3)0.0075 kL

The SI unit for the diffusion coefficient is m²/s, but older texts sometimes report diffusion coefficients in units of in²/min. What is the value of a diffusion coefficient of 21.3 in²/min expressed in SI units? (2.54 cm = 1 in exactly)

Convert 42.12 cm³ to cubic inches (in³) given that 1 inch = 2.54 cm (exact).

The number of significant figures in 2.1948 × 10^-9 nm is _____.

Silver chloride (AgCl) is relatively insoluble in water. At 25 °C, 1.3 × 10³ L of water is needed to dissolve 2.5 g of AgCl. What mass (in milligrams) of AgCl will dissolve in 1.0 L of water?

Carry out the following calculation and report your answer to the correct number of sig figs: $\frac { 2.423 \times 3.51 } { \text { num3 } }$

A 4.75 cm³ sample of solid gallium metal has a density of 5.910 g/cm³. What volume does this sample of gallium occupy in its liquid state? The density of liquid gallium is 6.100 g/cm³.